<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>块标签</title>
</head>
<body>
    <!--
    div:每个div占满一行。块级标签
    span:文本信息在一行展示，行内标签，内联标签
    -->
    <span>aaaaaaa</span>
    <span>bbbbbbbb</span>
    <hr>
    <div>aaaaaaa</div>
    <div>bbbbbbbb</div>


</body>
</html>